Warmup Heavy Duty Plastic TrowelHeavy Duty Plastic Trowel 11"� x 5.5"� with 1/4"� U-notch design.This Non-metallic trowel is specifically designed for use with electric floor heating systems.Specifications Dual edged for use with bonding and floor tile adhesives Excellent for installing radiant floor heating elements Non-conductive plastic blade and handle Won''t rust or corrode; easy to clean The PlasticTrowel Is lighter and easier to use than metal. The Plastic Trowel cleans up quickly, Mortar washes off easily and it will never develop rust spots. Metal trowels can become razor sharp over time and the edges are a danger to electric heating cables. The PlasticTrowel blade is made of durable ABS plastic so it"™s safer to use around heating elements. The PlasticTrowel is lightweight, but tough enough for commercial use